Charged oxygen in ionosphere may offer biomarker for exoplanets

On January 9, 1992, astronomers announced a momentous discovery: two planets orbiting a pulsar 2,300 light years from our sun. The two planets, later named Poltergeist and Draugr, were the first confirmed "exoplanets"—worlds ...

Glassfrogs show surprising diversity of parental strategies

Laid on leaves hanging over streams in tropical rainforests, glassfrog eggs are tasty snacks for snakes, insects and other predators until they hatch and drop into the streams to begin life as tadpoles. Until recently, biologists ...

Good news and bad news about forest fragmentation

Over the past centuries, as we humans have cleared fields for farms, built roads and highways, and expanded cities ever outward, we've been cutting down trees. Since 1850, we've reduced global forest cover by one-third. We've ...

Building a wireless micromachine

All around us, hiding just outside our range of vision, are miniscule machines. Tiny accelerometers in our cars sense a collision and tell the airbags to inflate. A Nintendo Wii controller's tiny gyroscopes translate your ...

Research connects soil moisture to next-day rainfall

In 1881, a land speculator named Charles Dana Wilber wrote a book called The Great Valleys and Prairies of Nebraska and the Northwest, in which he, stumping for western settlement, coined a phrase: "rain follows the plow."

Self-directed robot can identify objects

"That is a ball." "I do believe that is a cone." "Seems like a wonderful book." The voice is mechanical and flat, and anyone offering such banal commentary and sounding so bored would surely bomb in a job interview. But in ...

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